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US4725703A Expired / Lapsed US ⏱️ 0.0 years remaining

Turn table for use in a microwave range

Assignee: LG Electronics Inc
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Filing: 1986-11-26
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Granted: 1988-02-16
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Expires: 2006-11-26
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Abstract

Abstract A turntable for use in a microwave oven which comprises a first rotatable axle secured to the plate of the turntable and disposed within an annular holder, the first rotatable axle including a cavity disposed along its center, an actuating gear having a shaft extended therefrom for being actuated to engage the cavity of the rotatable axle, the actuating gear including an aperture disposed along its center for receiving a second axle supported on a lower plate of a housing member and an annular cam disposed at the underside thereof, the annular cam having an inclined surface disposed along its periphery, a supporting roller secured to the lower plate of the housing member for slidably contact with the declined surface of the annular cam for moving the actuating gear upwardly and downwardly, and a main driving gear actuated by a motor, the main driving gear geared with the actuating gears for rotating horizontally and simultaneously vertically so that the turntable rotates and moves vertically.

Inventors

  • 👤 Jong D. Park

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 13:34
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6408; H05B6/6411; F; F16; F16H; F16H37/00; F16H37/12; F16H37/16

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 172 words
A turntable for use in a microwave oven which comprises: a plate for supporting an object to be heated a first rotatable axle secured to the plate and disposed within an annular holder, said first rotatable axle including a cavity disposed along its center, an actuating gear having a shaft extended therefrom for being actuated to engage said cavity of said first rotatable axle, said actuating gear including an aperture disposed along its center for receiving a second rotatable axle supported on a lower plate of a housing member and an annular cam disposed at the underside thereof, said annular cam having an inclined surface disposed along its periphery, a supporting roller secured to the lower plate of the housing member for slidably contacting with said declined surface of the annular cam for moving the actuating gear upwardly and downwardly, and a main driving gear actuated by a motor, said main driving gear geared with said actuating gears for rotating horizontally and simultaneously vertically so that the turntable rotates and moves vertically.
Claim 2
Dependent Claim 172 words
A turntable for use in a microwave oven which comprises: a plate for supporting an object to be heated a first rotatable axle secured to the plate and disposed within an annular holder, said first rotatable axle including a cavity disposed along its center, an actuating gear having a shaft extended therefrom for being actuated to engage said cavity of said first rotatable axle, said actuating gear including an aperture disposed along its center for receiving a second rotatable axle supported on a lower plate of a housing member and an annular cam disposed at the underside thereof, said annular cam having an inclined surface disposed along its periphery, a supporting roller secured to the lower plate of the housing member for slidably contacting with said declined surface of the annular cam for moving the actuating gear upwardly and downwardly, and a main driving gear actuated by a motor, said main driving gear geared with said actuating gears for rotating horizontally and simultaneously vertically so that the turntable rotates and moves vertically.
Claim 3
Dependent Claim 14 words
The turntable of claim 1 wherein the cavity has a warning moon shaped configuration.
Claim 4
Dependent Claim 19 words
The turntable of claim 1 wherein the shaft has a waning moon shaped configuration for corresponding to the cavity.
Claim 5
Dependent Claim 19 words
The turntable of claim 1 wherein a range of vertical movement of the turntable is about λ/8 to λ/4.

References Cited (Backward Citations)

US4523070A Cited
US4591682A Cited
US4631379A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-02-15 1991-08-17 1992-02-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-02-15 1995-08-17 1996-02-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-02-15 1999-08-17 2000-02-16 $7700.00 Window Closed / Lapsed

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